Series (parallel) resonance ring energy transient valve direct control method
A control method and instantaneous value technology, applied in the direction of control/regulation system, regulation of electric variables, conversion of DC power input to DC power output, etc., can solve the destructive hazards of the circuit system, can not meet the requirements of direct control, phase-shift control and Problems such as power density control and control difficulties
Inactive Publication Date: 2005-03-02
YANSHAN UNIV
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The above three control methods are essentially adjusting the equivalent average voltage added to the series (parallel) resonant ring according to the output power, so as to realize the adjustment of the resonant inductor current or the resonant capacitor voltage. In terms of control strategy, none of them can satisfy Requirements for direct control of the instantaneous energy value of series (parallel) resonant rings; and when the output power needs to be adjusted in a wide range even when there is a power zero point and reverse power flow (such as a sine wave inverter power supply under inductive load and regenerative load conditions), Voltage regulation control, phase-shift control and power density control all have control difficulties or even cannot be realized; when it is necessary to achieve the control requirements of output voltage following through regulation (such as sine wave inverter circuit), if a short circuit occurs and the system does not have additional The protective circuit will cause destructive harm to the entire circuit system
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[0012] figure 1 The control principle block diagram shown is an embodiment of direct control of the energy instantaneous value of the series (parallel) resonant ring, and the switching frequency of the power tube is the natural resonant frequency f r . Using a frequency of f r The equal-amplitude sine wave 1 is used as the carrier wave, and the output 2 of the outer loop regulator is used as the modulation wave (taking the sine wave inverter power supply as an example, the output voltage instantaneous value closed-loop regulator output is used as the modulation wave), and the high-frequency multiplier is used to realize the carrier wave. Multiplied by the linearity of the modulating wave, the absolute value of the output of the multiplier is taken as the high-frequency reference 3 of the instantaneous value of the resonant inductor current or the resonant capacitor voltage. The high-frequency given signal and the absolute value feedback 4 of the resonant inductor current or ...
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This invention relates to series (parallet) resonant ring energy instantaneous value direct control method. Constant amplitude sinusoid with frequency of fr is used as carrier wave; the output of output ring regulator is used as modulation wave. The carrier wave and modulation wave proceed linear multiplying by using high frequency multipier. The output absolute value is used as instantaneous value given of high frequency resonant signal, with corresponding feed-back signal absolute-value difference proportional-pulse-integral control output to proceed comparison of positive-negative amplitude-limiting to obtain power tube control equirement, together with synchro-regulation of frequency doublnig square-wave of fr, and regulation of pulsewidth of square-wave with frequency fr and duty-ratio 50%, to obtain corresponding power tube driving signal. It has protection function when there is over-load or short-circuit condition.
Description
technical field [0001] The invention relates to an energy control technology of series (parallel) resonant rings. The control technology can directly control the instantaneous value of resonant ring energy by directly controlling the instantaneous value of resonant inductor current or resonant capacitor voltage. The control of the ring realizes forward, zero power and reverse transfer of power. Background technique [0002] At present, in power electronics technology, series (parallel) resonant rings are often used as the intermediary of energy transfer, and the current and voltage waveform conversion functions of the series (parallel) resonant rings are used to provide zero current and zero voltage switching moments for the main power transistor. The known series (parallel) resonant rings are mainly used in the main circuit of the half-bridge and full-bridge structures, and the control technologies for the energy of the series (parallel) resonant rings mainly include voltag...
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IPC IPC(8): H02M3/00
Inventor 邬伟扬金晓毅孙孝锋
Owner YANSHAN UNIV